[DOCS] Puts 1.0 documentation example code for how to run validations under test

[Rachel-Reverie]

Description

• Puts 1.0 example code under test for:
  • How to create a Validation Definition
  • How to run a Validation Definition

Definition of done

• PR title is prefixed with one of: [BUGFIX], [FEATURE], [DOCS], [MAINTENANCE], [CONTRIB]
• Code is linted - run invoke lint (uses ruff format + ruff check)
• Appropriate tests and docs have been updated

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.66%. Comparing base (c4756e1) to head (a90e96a).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #10230      +/-   ##
===========================================
+ Coverage    79.65%   79.66%   +0.01%     
===========================================
  Files          454      454              
  Lines        39507    39507              
===========================================
+ Hits         31468    31475       +7     
+ Misses        8039     8032       -7     

Flag	Coverage Δ
3.10	66.29% <ø> (ø)
3.11	66.29% <ø> (ø)
3.12	64.84% <ø> (ø)
3.12 aws_deps	45.81% <ø> (ø)
3.12 big	54.46% <ø> (ø)
3.12 filesystem	60.45% <ø> (ø)
3.12 mssql	49.91% <ø> (ø)
3.12 mysql	49.97% <ø> (ø)
3.12 postgresql	54.11% <ø> (ø)
3.12 spark	57.58% <ø> (ø)
3.12 trino	52.18% <ø> (ø)
3.8	66.34% <ø> (+0.01%)	⬆️
3.8 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	54.67% <ø> (ø)
3.8 aws_deps	45.84% <ø> (ø)
3.8 big	54.48% <ø> (ø)
3.8 databricks	47.10% <ø> (ø)
3.8 filesystem	60.47% <ø> (ø)
3.8 mssql	49.90% <ø> (ø)
3.8 mysql	49.96% <ø> (ø)
3.8 postgresql	54.10% <ø> (ø)
3.8 snowflake	48.02% <ø> (ø)
3.8 spark	57.54% <ø> (ø)
3.8 trino	52.17% <ø> (ø)
3.9	66.31% <ø> (ø)
cloud	0.00% <ø> (ø)
docs-basic	49.82% <ø> (+0.01%)	⬆️
docs-creds-needed	50.52% <ø> (+0.36%)	⬆️
docs-spark	49.48% <ø> (+0.36%)	⬆️

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